Status LEDs

Three Status LEDs, located on the unit's front panel, indicate NetClock's current operating status:

POWER: Green, always on while power is applied to the unit

SYNC: Tri-color LED indicates the time data accuracy

FAULT: Two-color, three-state LED, indicating if any alarms are present.

At power up, the unit automatically performs a brief LED test run during which all three LEDs are temporarily lit.

Front panel status indications

LED Label

Activity/Color

Description

POWER

Off

Both AC, and DC input power are disconnected.OR: The unit's AC input switch is turned OFF, and DC input is not present.

On/solid green

AC and/or DC Power are supplied; the unit detects all power inputs.

Red

The unit is configured for two power inputs, but detects only one power input. OR: Detects a power configuration error.

Green & blinking orange 1/sec.

Power Error — general power configuration fault.

SYNC

Red

Time Sync Alarm:1) The unit has powered up, but has not yet achieved synchronization with its inputs.2) The unit was synchronized to its selected input references, but has since lost all available inputs (or the inputs were declared invalid) and the Holdover period has since expired.

Solid green

The unit has valid time and 1PPS reference inputs present and is synchronized to its reference.

Orange

The unit is in Holdover Mode: It was synchronized to its selected input references, but has since lost all available inputs (or the inputs are not declared valid).The time and frequency outputs will remain useable until the Holdover period expires.

FAULT

Off

No alarm conditions are currently active.

Blinking orange

A GNSS antenna alarm has been asserted and is currently active. A short or open circuit has been detected in the GNSS antenna cable. The light will automatically turn off once the alarm condition clears.To troubleshoot this condition, see Troubleshooting via Web UI Status Page.

Solid orange

A Minor Alarm condition (other than an antenna problem alarm) has been asserted and is currently active.To troubleshoot this condition, see Minor and Major Alarms.

Red

A Major Alarm condition has been asserted and is currently active.To troubleshoot this condition, see Minor and Major Alarms.